"MORPHO-PHYSIOI,(X:lCAL AND BIOCHEMICAL ANALYSIS OF RICE GENOTYPES FOR WEED SUPPRESSION AND ALLELOPATHY
KrishiKosh
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Title |
"MORPHO-PHYSIOI,(X:lCAL AND BIOCHEMICAL ANALYSIS OF RICE GENOTYPES FOR WEED SUPPRESSION AND ALLELOPATHY
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Creator |
Bansidharrao, Jadhav Abhay
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Contributor |
Katiyar, Pratibha
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Subject |
rice, weeds, genotypes, biological development, planting, extraction, vegetative propagation, developmental stages, drying, land resources
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Description |
The present investigation entitled "Morpho-physiological and biochemical analysis of rice genotypes for weed suppression and allelopathy" was conducted in two cons'ecutive years in Kharif 2006 and 2007 at Instructional farm, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya Raipur (C.G.) under field and laboratory conditions in the Department of Plant Physiology to explicit the weed suppression ability and allelopathy among rice genotypes. The morpho-physiological traits involved in field conditions and the impact of extract of plant parts on germination and seedling growth behaviour of Echinochloa colona in laboratory conditions. The biochemical compounds of rice genotypes i.e. Chlorophyll content, total phenol content, total carbohydrate and total protein content were estimated and correlated with weed growth. The experiment was conducted in puddle transplanted rice (PTR) imgated upland conditions in factorial randomized block design with spacing 20x20 cm. It was observed that the genotype Safri-17 followed by Vasumati and Dubraj possessed highly weed suppression ability than other genotypes under field conditions. The morpho-physiological traits i.e. plant height, plant shoot biomass, photosynthetic rate, transpiration rate and growth parameters leaf area (LA), leaf area index (LAI), crop growth rate (CGR) and relative growth rate (RGR) were highly significant and negatively correlated with weed biomass and responsible for weed suppression. However, grain yield of rice was not found to be associated with weed suppression. But the genotypes those having less difference in yield in weedy check (unweeded) and hand weeding twice (control) situation remarkably found to be efficient for weed 198 suppression. Safri-17 (L), Dubraj (L) and Vasumati (M) were found better in this response. However, duration of crop was also not clearly proved any significance on weed suppression. But it seems long duration genotypes possessed the potential of weed suppression upto some extent. The laboratory experiments revealed that the extract of rice plant parts were significantly reduced the germination percentage and seedling growth parameters particularly shoot length, root length, seedling dry weight and vigour index of Echinochloa colona. The genotypes Vasumati, Dubraj and Safri-17, plant parts (leaf, stem and roots) showed maximum adverse impact on germination and seedling growth of E. colana than that of other genotypes. The biochemical component total phenol content and carbohydrate were significantly and negatively correlated with weed biomass. Rice leaf possessed maximum phenol content and root possessed minimum. Safri-17, Vasumati and Dubraj possessed higher phenol content (allelochemicals) compared to other genotypes. Whereas, chlorophyll content were non |
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Date |
2016-02-05T16:32:12Z
2016-02-05T16:32:12Z 2008 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/64180
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Language |
en
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Format |
application/pdf
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